It is lovely to wake up to a delicious breakfast...one that is prepared way before you need it. No matter which way you go ~ blueberry or strawberry you will be very pleased.
If you bake this oatmeal the night before then all you need to do is simply reach into your fridge, take a scoop and re-heat.
Pre heat oven to 350 degrees F with the rack in the center. Lightly coat a 13X9X2" inch baking dish with cooking spray. Combine all ingredients in a large bowl adding strawberries last. Sweeten to taste (I used 2 droppers full of vanilla stevia drops.) Bake for about one hour. It will firm up even more over night in the refrigerator. Serve with strawberry sauce and nuts.
Heat berries in a saucepan over medium high heat. Add water if using fresh strawberries. Bring to a boil and reduce to a simmer with the lid on. Berries will burst and become saucy. Let the sauce cool a bit. Purée in blender and add sweetener to taste if desired.
For the sauce: You might not need any water if using frozen berries as they have a lot of water in them all ready. If you need to thicken your sauce you can use some pectin, arrowroot or strain it in a fine mesh sieve. Here is a great post about how to thicken your fruit jam/sauce